The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2013
Filed:
Jan. 21, 2011
Takahiro Shima, Kanagawa, JP;
Junji Sato, Tokyo, JP;
Masashi Kobayashi, Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An injection locked frequency divider and a PLL circuit, having a wide operating frequency bandwidth and capable of reducing the influence of any parasitic capacitance, are provided. Injection locked frequency divider () includes ring oscillatorthat cascade-connects first amplifier circuit () including N-channel MOS transistor () and P-channel MOS transistor (), and second amplifier circuitand third amplifier circuit () that have the same configuration as first amplifier circuit () in three stages in a ring; N-channel MOS transistorin which the sources of N-channel MOS transistors () in the respective stages are connected to the drain thereof; and differential signal injection circuit () that injects injection signal Ito the gates of P-channel MOS transistors () in the respective stages and injects a reverse phase signal of injection signal Ias a differential signal to the gate of N-channel MOS transistor ().